Update unist-util-visit

Author: wooorm

package.json

@@ -35,7 +35,7 @@
   ],
   "dependencies": {
     "@types/unist": "^2.0.0",
-    "unist-util-visit": "^3.0.0"
+    "unist-util-visit": "^4.0.0"
   },
   "devDependencies": {
     "@types/tape": "^4.0.0",